0f6b398bf5f91af3ec82ad6a7417ec3dd71f7f220409d5c327b63a4c7334e844

Analysis

max time kernel
117s
max time network
119s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
26/04/2024, 14:17

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General

Target

tmp.exe
Size

1.5MB
MD5

09f16ecc21bd2d570fd6c6411128b714
SHA1

71dd57498b1989e7c61e1c4865f306e5d5e222f2
SHA256

0f6b398bf5f91af3ec82ad6a7417ec3dd71f7f220409d5c327b63a4c7334e844
SHA512

2b89d3c3e6722da0c7acfb8468aebfe112fadda93f71708e48035b9bb0ea35120a0eb1d04c80c4d2c4a2004f866f71d8a072f1f8ebc567d2813b243ac21488e1
SSDEEP

49152:KBrY2fc7XyDjhZ0j5Jl34KZbGiJyXoogg:ArncjyDNajHZbGi4

Score

7^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2904	UClient.exe

Loads dropped DLL 6 IoCs

pid	Process
2352	tmp.exe
2352	tmp.exe
2352	tmp.exe
2352	tmp.exe
2904	UClient.exe
2904	UClient.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Run\UClient = "C:\\Users\\Admin\\Desktop\\UClient.exe /s"	UClient.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry class 17 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\uclient\DefaultIcon\ = "C:\\Users\\Admin\\Desktop\\UClient.exe"	UClient.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\uclient\shell\open\command	UClient.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\.esc\DefaultIcon	UClient.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\.escr\DefaultIcon\ = "C:\\Users\\Admin\\Desktop\\UClient.exe"	UClient.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\uclient\ = "URL:uclient protocol handler"	UClient.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\uclient\shell\open\command\ = "C:\\Users\\Admin\\Desktop\\UClient.exe \"%1\""	UClient.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\.escr	UClient.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\.escr\DefaultIcon	UClient.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\uclient\DefaultIcon	UClient.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\uclient\URL Protocol = "戀"	UClient.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\uclient\shell	UClient.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\uclient\shell\open	UClient.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\.esc	UClient.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\.escr\ = "uclient"	UClient.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\uclient	UClient.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\.esc\DefaultIcon\ = "C:\\Users\\Admin\\Desktop\\UClient.exe"	UClient.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\.esc\ = "uclient"	UClient.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2352	tmp.exe
2904	UClient.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2904	UClient.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2904	UClient.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2352 wrote to memory of 2904	2352	tmp.exe	28
PID 2352 wrote to memory of 2904	2352	tmp.exe	28
PID 2352 wrote to memory of 2904	2352	tmp.exe	28
PID 2352 wrote to memory of 2904	2352	tmp.exe	28

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2352
- C:\Users\Admin\Desktop\UClient.exe
  "C:\Users\Admin\Desktop\UClient.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:2904

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\Desktop\UClient.exe

Filesize
1.5MB

MD5
09f16ecc21bd2d570fd6c6411128b714

SHA1
71dd57498b1989e7c61e1c4865f306e5d5e222f2

SHA256
0f6b398bf5f91af3ec82ad6a7417ec3dd71f7f220409d5c327b63a4c7334e844

SHA512
2b89d3c3e6722da0c7acfb8468aebfe112fadda93f71708e48035b9bb0ea35120a0eb1d04c80c4d2c4a2004f866f71d8a072f1f8ebc567d2813b243ac21488e1

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